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Astronomy Letters

, Volume 45, Issue 7, pp 462–473 | Cite as

Kinematic Parameters of the Stellar Velocity Field within 3 kpc of the Sun Based on the Gaia Data Release 2 with Radial Velocities Catalogue

  • A. S. TsvetkovEmail author
  • F. A. AmosovEmail author
Article
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Abstract

The paper is devoted to determining the parameters of the three-dimensional Ogorodnikov—Milne kinematic model based on the Gaia DR2 star catalogue (the subset of seven million stars containing radial velocities). The behavior of the parameters as a function of the distance to stars is studied. The parameters derived from the stellar proper motions and radial velocities agree well with one another. It is noted that the angular velocity of rotation retains its stability up to distances of ~3 kpc, while the parameter responsible for the translational motion along the Y axis abruptly begins to change from distances starting from 1 kpc.

Keywords

stellar kinematics proper motions radial velocities Galactic rotation Ogorodnikov—Milne model 

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Copyright information

© Pleiades Publishing, Inc. 2019

Authors and Affiliations

  1. 1.St. Petersburg State UniversitySt. PetersburgRussia

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